~~Page 1 of 3~~ UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934 For the month of ~~January~~May 2025 Commission File Number 001-14928 SANTANDER UK PLC (Translation of registrant's name into English) 2 Triton Square, Regent's Place, London NW1 3AN, England (Address of principal executive office) Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F. Form 20-F . . . .X. . . . Form 40-F . . . . . . . .

~~Page~~16 2May ~~of 3 28 January~~ 2025 Santander UK Group Holdings plc and Santander UK ~~Group Holdings~~ plc ~~(the “Companies”)~~ – Chair ~~succession~~ Appointment Santander UK ~~today~~Group ~~announces~~Holdings ~~that William Vereker, Board Chair, has indicated his intention to step down from the Santander UK~~ plc and Santander UK ~~Group Holdings~~ plc ~~Boards~~ (the “~~Boards~~Companies”) ~~during~~announce the ~~course~~appointment of ~~2025,~~ ~~once~~Sir aThomas Scholar ~~thorough~~(“Tom”) ~~appointment~~as ~~process~~an ~~and~~Independent ~~orderly~~Non-Executive ~~handover~~Director ~~have~~and ~~been~~Chair ~~completed~~Designate. ~~William~~ Tom has joined the ~~Boards~~Board inwith ~~October~~immediate effect ~~2020~~ and ~~was~~will ~~appointed~~succeed William Vereker as Chair ~~with~~of ~~effect~~the ~~from~~Companies on 1 ~~November~~August, ~~2020. Since~~at ~~then,~~which hepoint ~~has~~William ~~played~~will astand ~~critical~~down from ~~role~~the inBoard. Santander ~~overseeing~~Group anExecutive ~~extensive~~Chair ~~period~~Ana ofBotín ~~business~~said: ~~transformation,~~“Tom’s asexperience ~~well as~~and ~~leading~~insight afrom ~~significant~~his ~~evolution~~time ofin Whitehall, the ~~Board~~IMF, ~~including~~ and the ~~recruitment~~World ofBank awill ~~new~~be ~~CEO~~of huge value, and ~~refreshing~~I ~~all~~am ~~the Independent~~delighted ~~Non-executive~~to ~~Directors. Ana~~welcome ~~Botin,~~him ~~Banco~~to Santander SUK.A. ~~Group~~He ~~Executive~~joins ~~Chair~~us ~~said:~~at ~~“The~~an ~~Group~~exciting ~~Board~~time for isthe ~~very~~UK ~~grateful~~business ~~for~~as ~~the invaluable~~we ~~role~~continue ~~William~~to ~~has~~drive ~~played~~forward inour ~~steering~~transformation ~~the~~programme UKand ~~bank~~integrate ~~through~~Santander ~~some~~UK ofwith the ~~most challenging~~ ~~circumstances~~group’s inglobal ~~recent times~~platforms. On ~~Under~~behalf ~~his~~of ~~stewardship,~~the ~~Santander~~Group UKBoard, ~~has~~I ~~navigated~~would ~~Covid~~also ~~and~~like ~~a difficult economic environment~~ to ~~provide~~express ~~the~~my ~~support~~thanks ~~its~~for ~~customers,~~William’s ~~clients~~great ~~and~~contributions ~~people~~throughout ~~needed.~~his tenure. He ~~has~~helped ~~overseen~~ to guide the ~~essential~~bank ~~transformation~~through one of the ~~business~~most ~~that~~challenging ~~will~~periods ~~make~~faced by the UKfinancial asector ~~core~~in ~~part~~recent ofyears and ~~the~~has ~~Group’s~~ensured ~~success~~it inis ~~the years~~now well placed to ~~come.~~build Weon ~~wish~~the ~~him~~momentum ~~well~~generated ~~for~~over the ~~future~~last year.” ~~William~~ Sir ~~Vereker~~Tom Scholar said: “I am delighted to be joining Santander UK, ~~has~~and ~~undergone~~look aforward ~~significant~~to ~~transformation~~supporting ~~since~~the ~~2020~~Board and itthe Executive ~~has~~Committee ~~been an~~as ~~honour~~they tolead ~~Chair~~the ~~its~~bank ~~Boards~~through ~~during~~the ~~that~~next ~~time~~stages of its transformation.” Tom Iis ama ~~immensely~~former ~~proud~~Senior ofCivil ~~the~~Servant ~~progress~~who spent the ~~business~~majority ~~has~~of ~~made and~~his ofcareer ~~the~~with ~~team~~HM ~~who~~Treasury ~~have~~at ~~delivered~~the ~~it,~~centre asof ~~well~~the asUK economic ~~how~~and wefinancial ~~have~~system, ~~delivered~~including ~~for~~serving ~~customers.~~as ISecond amPermanent ~~excited~~Secretary ~~about how~~during the ~~business~~Financial ~~will~~Crisis ~~continue~~and, tolatterly, ~~develop~~as Permanent ~~under~~Secretary ~~the~~for ~~leadership~~six ofyears myto ~~successor~~2022. ~~With~~ ~~the~~He ~~transformation well~~also ~~under~~spent ~~way~~six ~~and~~years ~~having~~at athe ~~strong~~IMF ~~CEO~~ and aWorld ~~refreshed~~Bank ~~Board~~from in2001 ~~place~~to 2007, ~~now~~and served isas the ~~right~~Chief ~~time~~of ~~for~~Staff meand toPrincipal ~~step down” The~~Private ~~Santander~~Secretary UKto ~~Board~~the ~~Nomination~~Prime ~~and~~Minister ~~Governance~~2007-2008. Tom ~~Committee~~ is ~~undertaking~~currently aChair ~~thorough~~of ~~Chair appointment~~Nomura ~~process~~International ~~and~~plc, ~~the~~Nomura ~~new~~Bank ~~Chair~~International ~~will~~plc beand ~~announced~~Nomura in(Europe) ~~due~~Holdings ~~course~~plc. - Ends - Additional information about Santander UK and Banco Santander Santander UK is a financial services provider in the UK that offers a wide range of personal and commercial ~~financial~~ financial products and services. At 3031 ~~June~~December 2024, the bank had around 1918,~~600~~000 employees and serves around 14 million active customers, including 7 million digital customers via a nationwide 444 branch network, telephone, mobile and online banking. Santander UK is subject to the full supervision of the FCA and the PRA in the UK. Santander UK plc customers’ eligible deposits are protected by the FSCS in the UK. Banco Santander (SAN SM, STD US, BNC.LN) is a leading commercial bank, founded in 1857 and headquartered in Spain and one of the largest banks in the world by market capitalization. The group’s activities are consolidated into five global businesses: Retail & Commercial Banking, Digital Consumer Bank, Corporate & Investment Banking (CIB), Wealth Management & Insurance and Payments (PagoNxt and Cards). This operating model allows the bank to better leverage its unique combination of global scale and local leadership. Banco Santander aims to be the best open financial services platform providing services to individuals, SMEs, corporates, financial institutions and governments. The bank’s purpose is to help people and businesses prosper in a simple, personal and fair way. Banco Santander ~~is building a more responsible bank and~~ has ~~made~~ a ~~number~~listing of ~~commitments~~its toordinary ~~support~~shares ~~this~~on ~~objective,~~the ~~including~~London ~~raising~~Stock ~~€220~~Exchange ~~billion in green financing between 2019~~ and ~~2030. In the first quarter of 2024, Banco~~ Santander ~~had~~UK ~~€1.3~~plc ~~trillion~~has inpreference shares ~~total~~listed ~~funds,~~on ~~166~~the ~~million~~London ~~customers,~~Stock ~~8,400 branches and 211,000 employees~~Exchange.

~~Page 3 of 3~~ SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. SANTANDER UK PLC By: / s / ~~John~~Roz ~~Mills~~Rule Name: ~~John~~Roz ~~Mills~~Rule Title: Company Secretary Dated: ~~January~~May 2919, 2025

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